Initial commit: ccnxlibs.

Change-Id: I1b376527a7dd01a6b9e083a6cb646955902f45c0
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>

1 files changed, 263 insertions, 0 deletions

diff --git a/libccnx-common/ccnx/common/ccnx_Link.h b/libccnx-common/ccnx/common/ccnx_Link.h
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+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file ccnx_Link.h
+ * @ingroup ContentObject
+ * @brief A generic CCNx link that contains a hash, name, KeyID.
+ *
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+#ifndef libccnx_ccnx_Link_h
+#define libccnx_ccnx_Link_h
+
+#include <ccnx/common/ccnx_Name.h>
+
+#include <parc/security/parc_Signature.h>
+#include <parc/algol/parc_Memory.h>
+#include <parc/algol/parc_Buffer.h>
+
+struct ccnx_link;
+
+/**
+ * @typedef CCNxLink
+ * @brief A generic CCNx link that contains a hash, name, KeyID.
+ * @see {@link ccnxLink_Create}
+ */
+typedef struct ccnx_link CCNxLink;
+
+/**
+ * Create a new `CCNxLink` instance.
+ *
+ * @param [in] name The {@link CCNxName} for the new `CCNxLink`.
+ * @param [in] keyId A {@link PARCBuffer} containing the KeyID for the new `CCNxLink`.
+ * @param [in] contentObjectHash A `PARCBuffer` containing the Content Object Hash for the new `CCNxLink`.
+ * @return A pointer to a new `CCNxLink` instance, or NULL if an error or out of memory.
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+CCNxLink *ccnxLink_Create(const CCNxName *name, PARCBuffer *keyId, PARCBuffer *contentObjectHash);
+
+/**
+ * Create a new `CCNxLink` instance as a copy of the original.
+ *
+ * @param [in] original The {@link CCNxLink} to copy.
+ * @return A pointer to a new `CCNxLink` instance, or NULL if an error or out of memory.
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+CCNxLink *ccnxLink_Copy(const CCNxLink *original);
+
+/**
+ * Fetch the name associated with this `CCNxLink`.
+ *
+ * @param [in] link  A pointer to a `CCNxLink` instance
+ * @return The {@link CCNxName} associated with the @p link.
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+const CCNxName *ccnxLink_GetName(const CCNxLink *link);
+
+/**
+ * Fetch the KeyID associated with this `CCNxLink`.
+ *
+ * @param [in] link  A pointer to a `CCNxLink` instance
+ * @return a {@link PARCBuffer} containing the KeyID associated with the @p link.
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+PARCBuffer *ccnxLink_GetKeyID(const CCNxLink *link);
+
+/**
+ * Fetch the ContentObjectHash associated with this `CCNxLink`.
+ *
+ * @param [in] link  A pointer to a `CCNxLink` instance
+ * @return a {@link PARCBuffer} containing the Content Object Hash associated with the @p link.
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+PARCBuffer *ccnxLink_GetContentObjectHash(const CCNxLink *link);
+
+/**
+ * Determine if two `CCNxLink` instances are equal.
+ *
+ * The following equivalence relations on non-null `CCNxLink` instances are maintained:
+ *
+ *   * It is reflexive: for any non-null reference value x, `ccnxLink_Equals(x, x)` must return true.
+ *
+ *   * It is symmetric: for any non-null reference values x and y, `ccnxLink_Equals(x, y)` must return true if and only if
+ *        `ccnxLink_Equals(y x)` returns true.
+ *
+ *   * It is transitive: for any non-null reference values x, y, and z, if
+ *        `ccnxLink_Equals(x, y)` returns true and
+ *        `ccnxLink_Equals(y, z)` returns true,
+ *        then  `ccnxLink_Equals(x, z)` must return true.
+ *
+ *   * It is consistent: for any non-null reference values x and y, multiple invocations of `ccnxLink_Equals(x, y)`
+ *         consistently return true or consistently return false.
+ *
+ *   * For any non-null reference value x, `ccnxLink_Equals(x, NULL)` must return false.
+ *
+ *
+ * @param [in] x A pointer to a `CCNxLink` instance.
+ * @param [in] y A pointer to a `CCNxLink` instance.
+ * @return `true` if the referenced `CCNxLink` instances are equal.
+ *
+ * Example:
+ * @code
+ * {
+ *    CCNxLink *a = ccnxLink_Create();
+ *    CCNxLink *b = ccnxLink_Create();
+ *
+ *    if (ccnxLink_Equals(a, b)) {
+ *        // true
+ *    } else {
+ *        // false
+ *    }
+ * }
+ * @endcode
+ */
+bool ccnxLink_Equals(const CCNxLink *x, const CCNxLink *y);
+
+/**
+ * Create a null-terminated string representation of the given `CCNxLink`.
+ *
+ * The returned value must be freed by the caller using {@link parcMemory_Deallocate()}.
+ *
+ * @param [in] link  A pointer to a `CCNxLink` instance.
+ * @return A pointer to null-terminated string of characters that must be freed by the caller by `parcMemory_Deallocate()`.
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+char *ccnxLink_ToString(const CCNxLink *link);
+
+/**
+ * Increase the number of references to an instance of this object.
+ *
+ * Note that new instance is not created,
+ * only that the given instance's reference count is incremented.
+ * Discard the reference by invoking {@link ccnxLink_Release()}.
+ *
+ * @param [in] link  A pointer to a `CCNxLink` instance to acquire.
+ * @return The value of the input parameter @p link.
+ *
+ * Example:
+ * @code
+ * {
+ *     ...
+ *
+ *     CCNxLink *link = ccnxLink_Acquire(instance);
+ *
+ *     ccnxLink_Release(&link);
+ *
+ * }
+ * @endcode
+ *
+ * @see ccnxLink_Release
+ */
+CCNxLink *ccnxLink_Acquire(const CCNxLink *link);
+
+/**
+ * Release a previously acquired reference to the specified instance,
+ * decrementing the reference count for the instance.
+ *
+ * The pointer to the instance is set to NULL as a side-effect of this function.
+ *
+ * If the invocation causes the last reference to the instance to be released,
+ * the instance is deallocated and the instance's implementation will perform
+ * additional cleanup and release other privately held references.
+ *
+ * @param [in,out] linkP A pointer to a pointer to the instance to release.
+ *
+ *
+ * Example:
+ * @code
+ * {
+ *     ...
+ *
+ *     CCNxLink *link = ccnxLink_Acquire(instance);
+ *
+ *     ccnxLink_Release(&link);
+ *
+ * }
+ * @endcode
+ */
+void ccnxLink_Release(CCNxLink **linkP);
+
+/**
+ * Check that the pointer to the `CCNxLink` is valid. It should be non-null,
+ * and any referenced data should also be valid.
+ *
+ * @param [in] link  A pointer to a `CCNxLink` instance
+ *
+ *
+ * Example:
+ * @code
+ * {
+ *     ...
+ *
+ *     CCNxLink *link = ccnxLink_Acquire(instance);
+ *
+ *     ccnxLink_AssertValid(link);
+ *
+ * }
+ * @endcode
+ */
+void ccnxLink_AssertValid(const CCNxLink *link);
+
+/**
+ * Determine if a `CCNxLink` instance is valid.
+ *
+ * @param [in] link  A pointer to a `CCNxLink` instance
+ * @return true The instance is valid.
+ * @return false The instance is invalid.
+ *
+ *
+ * Example:
+ * @code
+ * {
+ *     ...
+ *
+ *     CCNxLink *link = ccnxLink_Acquire(instance);
+ *
+ *     ccnxLink_AssertValid(link);
+ *
+ * }
+ * @endcode
+ */
+bool ccnxLink_IsValid(const CCNxLink *link);
+#endif // libccnx_ccnx_Link_h